It all started with me looking at the --help output which also printed "bhyve" as supported hypervisor type. Well, it's not on my Linux machine. To resolve this, I'm just creating a static array of { "$driver", callback() } pairs and iterating over it. The array is then initialized at compile time with supported drivers. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- tools/virt-host-validate.c | 80 +++++++++++++++++++++----------------- 1 file changed, 45 insertions(+), 35 deletions(-) diff --git a/tools/virt-host-validate.c b/tools/virt-host-validate.c index 426648a5d3..365b8acd92 100644 --- a/tools/virt-host-validate.c +++ b/tools/virt-host-validate.c @@ -29,6 +29,7 @@ #include "internal.h" #include "virerror.h" #include "virgettext.h" +#include "virglibutil.h" #include "virt-host-validate-common.h" #if WITH_QEMU @@ -44,26 +45,58 @@ # include "virt-host-validate-ch.h" #endif +typedef struct _virValidateCallbacks virValidateCallbacks; +struct _virValidateCallbacks { + const char *name; + int (*callback)(void); +}; + +static virValidateCallbacks validateCallbacks[] = { +#if WITH_QEMU + { "qemu", virHostValidateQEMU }, +#endif +#if WITH_LXC + { "lxc", virHostValidateLXC }, +#endif +#if WITH_BHYVE + { "bhyve", virHostValidateBhyve }, +#endif +#if WITH_CH + { "ch", virHostValidateCh }, +#endif +}; + static void show_help(FILE *out, const char *argv0) { + g_autofree char *hvs = NULL; + char *hvs_list[G_N_ELEMENTS(validateCallbacks) + 1] = { }; + size_t i; + + for (i = 0; i < G_N_ELEMENTS(validateCallbacks); i++) { + hvs_list[i] = g_strdup_printf(" - %1$s", validateCallbacks[i].name); + } + + hvs = g_strjoinv("\n", hvs_list); + + for (i = 0; i < G_N_ELEMENTS(validateCallbacks); i++) { + g_free(hvs_list[i]); + } + fprintf(out, _("\n" "syntax: %1$s [OPTIONS] [HVTYPE]\n" "\n" " Hypervisor types:\n" "\n" - " - qemu\n" - " - lxc\n" - " - bhyve\n" - " - ch\n" + "%2$s\n" "\n" " Options:\n" " -h, --help Display command line help\n" " -v, --version Display command version\n" " -q, --quiet Don't display progress information\n" "\n"), - argv0); + argv0, hvs); } static void @@ -87,6 +120,7 @@ main(int argc, char **argv) int ret = EXIT_SUCCESS; bool quiet = false; bool usedHvname = false; + size_t i; if (virGettextInitialize() < 0 || virErrorInitialize() < 0) { @@ -126,37 +160,13 @@ main(int argc, char **argv) virValidateSetQuiet(quiet); -#if WITH_QEMU - if (!hvname || STREQ(hvname, "qemu")) { - usedHvname = true; - if (virHostValidateQEMU() < 0) - ret = EXIT_FAILURE; + for (i = 0; i < G_N_ELEMENTS(validateCallbacks); i++) { + if (!hvname || STREQ(hvname, validateCallbacks[i].name)) { + usedHvname = true; + if (validateCallbacks[i].callback() < 0) + ret = EXIT_FAILURE; + } } -#endif - -#if WITH_LXC - if (!hvname || STREQ(hvname, "lxc")) { - usedHvname = true; - if (virHostValidateLXC() < 0) - ret = EXIT_FAILURE; - } -#endif - -#if WITH_BHYVE - if (!hvname || STREQ(hvname, "bhyve")) { - usedHvname = true; - if (virHostValidateBhyve() < 0) - ret = EXIT_FAILURE; - } -#endif - -#if WITH_CH - if (!hvname || STREQ(hvname, "ch")) { - usedHvname = true; - if (virHostValidateCh() < 0) - ret = EXIT_FAILURE; - } -#endif if (hvname && !usedHvname) { fprintf(stderr, _("%1$s: unsupported hypervisor name %2$s\n"), -- 2.44.2